[OS-BUILD PATCHv3] wireguard: disable in FIPS mode

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From: Hangbin Liu <haliu@xxxxxxxxxx>

wireguard: disable in FIPS mode

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1940794
Upstream: RHEL Only

The cryptos(BLAKE2S, Curve25519, CHACHA20POLY1305) in WireGuard are not
FIPS approved. Disable loading the cryptos is a better solution, but the
cryptos called by WireGuard are in lib/crypto/ instead of crypto/, which
is a little complex to disable. While disabling the WireGuard module is
more clear and easier.

So let's disable the WireGuard in FIPS mode first. When the issue that
loading the lib/crypto/ code in FIPS mode is fixed. We can revert this
internal patch.

Signed-off-by: Hangbin Liu <haliu@xxxxxxxxxx>

diff a/drivers/net/wireguard/main.c b/drivers/net/wireguard/main.c
--- a/drivers/net/wireguard/main.c
+++ b/drivers/net/wireguard/main.c
@@ -12,6 +12,7 @@
 
 #include <uapi/linux/wireguard.h>
 
+#include <linux/fips.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/genetlink.h>
@@ -21,6 +22,11 @@ static int __init mod_init(void)
 {
 	int ret;
 
+#ifdef CONFIG_RHEL_DIFFERENCES
+	if (fips_enabled)
+		return -EOPNOTSUPP;
+#endif
+
 #ifdef DEBUG
 	if (!wg_allowedips_selftest() || !wg_packet_counter_selftest() ||
 	    !wg_ratelimiter_selftest())

--
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/994
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